b12 injection deficiency Are Vitamin Shots Right for You? Vitamin B12 Injections: What You

The deltoid (upper arm) is also an IM site but can be harder to reach on your own

doi: 10.1016/j.tips.2005.09.002

We dont fully understand how, but it seems like this type of B12 could modulate the synthesis of melatonin, a hormone involved in regulating your sleep-wake cycle: Eight young males were subjected to a single blind cross-over test to see the effects of vitamin B12 (methylcobalamin) on the phase-response of the circadian melatonin rhythm to a single bright light exposure

However, head-to-head clinical trials remain limited

Most people notice that any visible results in the first month are generally modest, and are closely linked to lifestyle improvements rather than the injections alone